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oai:www.ideals.illinois.edu:2142/34282 2023-07-10 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Hu, Yih-Chun Hu, Yih-Chun Borisov, Nikita Caesar, Matthew C. Vaidya, Nitin H. Choi, Jihyuk 2012-09-18T21:09:27Z 2012-09-18T21:09:27Z 2012-08 2012-09-18T21:09:27Z 2012-08 Medium access control (MAC) protocol security is important in wireless networks due to the lack of physical access control that normally exists in wired networks in the form of connecting a cable. Most efforts in standards organizations and academic research focus on the requirements of confidentiality and authentication. These approaches to wireless MAC-layer security often ignore two other threats to security: attacks against availability and incorrect implementation of MAC protocol and driver routines. The former can prevent a user from communicating at all, whereas the latter can have consequences ranging from dropped packets to complete host compromise. This dissertation comprehensively investigates the threats against wireless MAC protocols: being uncooperative, denial-of-service (DoS), sniffing, man-in-the-middle (MITM), and fuzzing. I provide a mathematical model to understand how network parameters impact the uncooperative carrier-sense-misbehaving attackers. Next, this dissertation shows a novel DoS attack that targets queuing behavior of access points by exploiting some factors of the IEEE 802.11 MAC protocol. Further, I propose a scheme that establishes a wireless connection that is secure against sniffing and MITM between a client device and an access point in IEEE 802.11 hotspots. Finally, I propose MAC-layer threats including fuzzing in IEEE 802.16e mobile WiMAX networks. Item withdrawn by Alexis Thompson (athmpsn1@illinois.edu) on 2012-07-09T14:09:36Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 Choi_Jihyuk.pdf: 5484142 bytes, checksum: 0cd8b950ba792d69753654b6d8d43238 (MD5) Made available in DSpace on 2012-09-18T21:09:27Z (GMT). No. of bitstreams: 2 Choi_Jihyuk.pdf: 5484142 bytes, checksum: 0cd8b950ba792d69753654b6d8d43238 (MD5) license.txt: 4060 bytes, checksum: f766cc356100ccbf9db9a0661d0bbae7 (MD5) http://hdl.handle.net/2142/34282 en Copyright 2012 Jihyuk Choi Medium access protocol Wireless networks Security Security threats to the MAC-layer in wireless networks Electrical & Computer Eng 1933 Electrical & Computer Engr 1200 University of Illinois at Urbana-Champaign Dissertation Ph.D. PHD:Electr & Computer Eng-UIUC 10KS1200PHD